Vibrator.



G. VANDE.

VIBRATOR.

APPLIGATION FILED JUNI: 16,1913.

Patented Apr. 14, 1914.

ffy. /.A 47

l* ITED STATES PATENT OFFICE.

GERARD `VANDE, OF LOS ANGELES, CALIFORNIA.

VIBRATOR.

Specification of Letters Patent.

Application led June 16, 1913.

Patented Apr. 14, 1914.

Seriall No. 773,803.

To all 'whom it may concern Be it known that I, GERARD VANDE, a citi--zen of the United States, residing at Los Angeles, in the county of LosAngeles, State of California, have invented new and useful' Improvementsin Vibrators, of which the `following is a specification.

This invention relates to vibrators and particularly, to vibrators formassage and medical purposes and preferably to vibra-v lextensions onopposite sides thereof; and I preferably place the energizingr coil onthe central core, although this may be as desired. I utilize an armaturewhich I attach at each end to the lateral pole extensions, the armatureextending over the central core; and my preferred form of constructionfor the armature includes a Hat steel spring backed by a body of ironlaminae which are preferably severed or broken at their centers. form ofarmature I have found to give very efficient results, the iron bodyproviding for the rapid reversals of magnetic flux necessary for theoscillation of the armature, and the steel spring providing thenecessary resiliency. I have illustrated my preferred form of mechanismin the accompanying drawings, in which:

Figure 1 isl a vertical longitudinal section of my apparatus. Fig. 2 isan exterior view thereof. Fig. 3 is a horizontal section taken asindicated by line 3-3 of Fig. 1. Fig. 4 is a horizontal section taken asindicated by line 4 4 of Fig. 1. Fig. 5 is a horizontal section taken asindicated by line 5 5 of Fi r. 1.

In the drawings the numeral 10 may designate a suitable oase which Ipreferably provide with depressions 11 so that the case may be graspedby the fingers, and thus ob- 'viate the necessity of a handle for thedevice.

The case is preferably of the oval cross section shown in the variousdrawings and has heads 10il and 10b. Within the case I mount a magneticcore 12, preferably constructed of sheet iron laminae and preferably indou- Such a ble-U-shaped form with a central core 13 and lateral poleextensions 414 on opposite sides of the central core. The energizingcoil 15.is preferably placed around the central core and is suitablyconnected to wires 16 by which it may be connected to any suitablesource of alternating current.

My armature I provide with a body of laminated iron 26, beneath which Ihave two flatvspring steel straps 27. The body of iron laminae 26 issevered or broken at its center, as illustrated at 26a; so that theresiliency of the spring steel straps 27 is practically the onlyresiliency possessed by the armature. The endsof the composite armatureare held under clips 30 'which are pivotally attached yat 31 to the poleextensions 14,

and a small space is provided by beveling the faces of the poleextensions. as at 14, to provide for the oscillation of the armature. Toreduce noise to a minimum, I have provided a small pad of felt, or othersuitable material, 35 on the upper end of the core 13, the

edges of the pad being held between laminae of the core. e

l The central core 13 is provided with a bore or opening through whichthe vibration rod 41 passes. This vibration rod is directly attached tothe armature; and I prefer to make the construction so that thevibration rod also acts as a boltwhich holds the various parts of thearmature together.

For this purpose, I provide a washer 42 beneath the armature on thevibration rod, the clip 43 and nut 44 above the armature on thevibration rod, the rod passing through the armature in the soft ironlaminated body.

The clip 43 holds the soft iron laminae from lateral motion; and thewhole construction is such that the soft iron body is held to the Isteel springs 27 so that the armature will vibrate as a solid Whole.Adjustable stop screw 45, having a spring detent 46 which pressesagainst a flat faced portion 47 of the screw head, is adapted to limitthe movement of the armature away from the magnet..

The movement of the armature away from the magnet is induced by theresilient vaction of the steel springs 27: or is induced .by pressureagainst the massage tool 50 mounted on the outer end of'vibrator yrod41. When the massage tool 50 is pressed against the person, there is aconstant tendency to press the armature away from the magnet: and theadjustable stop screw 45 limits thisl tendency.

By actual construction and ractice my device has proven to be very ecient in its action, although it is exceedingly simple and inexpensiveof construction. Operated by alternating current as usually available,of either 50 or G0 cycles per second, the speed of vibration is aboutthat which is commonly used in laboratory massage machines: while I amenabled to obtain variable amplitude of vibration With a maximumsuilicient for all needs and purposes.

Having described Ya preferred form of my invention, I claim:

l. A vibra-tor, comprising a double-U- shaped magnet With a central coreand lateral pole extensionsan energizing coil for the magnet and aspring armature attached to both polar extensions and extending mediallyover the core.

2. A Vibrator, comprising a double-U- shaped magnet with a central coreand lateral pole extensions on opposite sides thereof, an energizingcoil for the core, and a spring armature pivotally attached to bothpolar extensions and extending medially over the core.

3. A vibrator, comprising a double-U- shaped magnet with a central coreand lateral pole extensions on opposite sides thereof, an energizingcoil for the core, and a spring armature attached to both polarextensions and extending medially over the core, said armaturecomprising a body of soft1 iron laminae and a flat strip, of spring stee4. A vibrator, comprising a double-U- shaped magnet with a central coreand lateral pole extensions on opposite sides thereof, an energizingcoil for the core, and a spring armature attached to both polarextensions and extending medially over the core, said armaturecomprising a body of soft iron laminae broken centrally over the core,and a flat strip of spring steel continuous bet-Ween the points ofattachment to the lateral pole extensions.

5. A vibrator, comprising a double-U-4 shaped magnet With a central coreand lateral pole. extensions on opposite sides thereof, an energizingco-il for the core, and a spring armature attached to both polarextensions and extending medially over the core, said armaturecomprising a body of soft iron laminas broken centrally over the core,and a Hat strip of spring steel continuous between the points ofattachment to the lateral pole extensions, and means to hold the softiron laminas to the steel strip at its center. l

6. A vibrator, comprising a double-U- shaped magnet with a central coreand lateral pole extensions, an energizing coil for the magnet, anarmature connected to both polar extensions and extending medially overthe core, and spring means for rendering resilient the motion of thearmature to and from the central core.

In Witness that I claim the foregoing I have hereunto subscribed my namethis 9th day of June, 1913.

GERARD VANDE. Ttnessesz DRUE L. HOFFMAN, JAMES T. BARKELEW.

